package com.albertyjz.juc;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class ShareResource{
    private int number=1;
    private Lock lock=new ReentrantLock();
    private Condition condition1=lock.newCondition();
    private Condition condition2=lock.newCondition();
    private Condition condition3=lock.newCondition();
    public void print1(){
        lock.lock();
        try {
            while (number!=1){
                condition1.await();
            }
            for (int i=1;i<=5;i++){
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            number=2;
            condition2.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
    public void print2(){
        lock.lock();
        try {
            while (number!=2){
                condition2.await();
            }
            for (int i=1;i<=10;i++){
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            number=3;
            condition3.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
    public void print3(){
        lock.lock();
        try {
            while (number!=3){
                condition3.await();
            }
            for (int i=1;i<=15;i++){
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            number=1;
            condition1.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
}
// 题目：有三个线程顺序调用，以此打印数据，a是5次，b是10ci，c是15ci，来10轮。
public class ThreadOrderAccess {
    public static void main(String[] args) {
        ShareResource shareResource=new ShareResource();
        new Thread(()->{
            for (int i = 1; i <= 10; i++) {
                shareResource.print1();
            }
        },"A").start();
        new Thread(()->{
            for (int i = 1; i <= 10; i++) {
                shareResource.print2();
            }
        },"B").start();
        new Thread(()->{
            for (int i = 1; i <= 10; i++) {
                shareResource.print3();
            }
        },"C").start();
    }

}
